As a backend team leader, I optimized queries in legacy projects, improving performance across systems. I led over 10 high-impact projects in six months, ensuring timely delivery and best practices. I mentor junior developers, foster teamwork, and streamline processes to enhance productivity, system stability, and innovation.Mentored 8 developers, increasing team productivity by 25% with guidance in optimized coding practices.Conducted all technical interviews for the company, successfully hiring 4 new developers and ensuring a smooth onboarding process as they quickly learned to write fast, optimized, and best practice code.

Developed and optimized APIs with FastAPI and Odoo for eCommerce, increasing API speed by 30-40% and reducing project building time by 25-30% by leveraging experience and best practices to write faster, scalable, high-performance APIs.Migrated media files to Minio storage, converted images to WebP with resizing (achieving 10x size reduction), and implemented a CDN, reducing API response time by 30%, decreasing file sizes, and saving users' network data.Integrated multiple payment systems (Payme, Click, Paylov, Paynet, FreedomPay, Ngenius, Stripe, Smart Glocal) and handled 5,000+ monthly transactions securely, including tax management with the "OFD Soliq" service when required.Resolved all N+1 query issues, optimized and refactored legacy code, implemented dynamic triggers for cache utilization, and migrated table data to new logic structures, reducing response times by 20-30% and query times by 60%.Utilized Celery with beat to manage cron jobs and background tasks, efficiently handling over 1,000 tasks daily.

Developed an online learning platform with a landing page, student page, and admin dashboard, writing all APIs and permissions to improve communication between services and boost platform stability by 30%.Wrote over 150 unit tests to ensure full API coverage while integrating payment systems, SMS and email providers, and a DRM video cipher service to provide enhanced security and smooth transactions for over 1,000 users.Implemented a quiz-based unlock system, reducing user errors by 15% and increasing course completion by 30%.Developed a powerful queue service for asynchronous task management, improving system performance and user experience.

Resolved and fixed N + 1 query challenges through strategic implementations of JOINs and caching systems, resulting in optimized database performance. Orchestrated a database query overhaul, achieving a notable 50% reduction in page loading time.Implemented Google and Facebook login (Social Authorization) which is used daily by more than 20% of users. Contributed to add and improve unit tests that increased test coverage rate by 15%.Integrated payment services like Payme, Click, Payze, Stripe, Adyen, PayFast and AlifNasiya which processed payments of more than 4,000 orders.Migrated file storage to DigitalOcean AWS S3, significantly improving system performance.Implemented a WebSocket solution for real-time customer notifications, elevating engagement.

Used Python, Django, and Git to develop scalable modules with seamless integration and performance.Optimized back-end code, built robust APIs and Telegram bots, and handled DevOps for seamless deployment.

Developed websites and bots, employing parsing techniques for efficient data extraction and transformation.Led and mentored more than 100 junior team members and students.